anonymous
  • anonymous
factorise y^3-10y+3
Mathematics
schrodinger
  • schrodinger
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Yacoub1993
  • Yacoub1993
\[y ^{3}-10y+3=0\] \[y ^{3}-10y=-3\] \[-9y ^{3}=-3\] \[y ^{3}=\frac{ -3 }{ -9 }\] \[y ^{3}=\frac{ 1 }{ 3 }\]
klimenkov
  • klimenkov
@Yacoub1993 Check the third step.
anonymous
  • anonymous
y^3 and 10y not like terms???

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Yacoub1993
  • Yacoub1993
ohh ok
anonymous
  • anonymous
x-3 is a factor
Yacoub1993
  • Yacoub1993
mistaken didnt focus sorry
anonymous
  • anonymous
\[(x-3)(x^2+3x-1)\]
Yacoub1993
  • Yacoub1993
go ahead next
anonymous
  • anonymous
y you are putting it equal to zero??? @Yacoub1993
anonymous
  • anonymous
its finished like that
Yacoub1993
  • Yacoub1993
so that i factorize it
anonymous
  • anonymous
no no basically what you are trying to find a value of y such that if you put it in this equation will result in zero not to factorize it
Yacoub1993
  • Yacoub1993
ahha understood @rizwan_uet u should be my tutor for real :)
anonymous
  • anonymous
thanks Yacoub i will help you if you need
anonymous
  • anonymous
you have this y^3-10y+3 now we can write y^3+3y^2-3y^2-y-9y+3 y^3-3y^2+3y^2-9y-y+3 y^2(y-3)+3y(y-3)-1(y-3) can you do the last step??

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